Question 279354
nickel=.05   N= amount of nikels
dime=.10     D= amount of dimes
N+D=28
.05N+.10D=1.95
u can either use substitution or elimination method. im going to use elimination method
{{{N+D=28}}}multiply this line by -.10 to get:
{{{-.10N-.10D=-2.8}}}
{{{.05N+.10D=1.95}}} add these to equations together
{{{-.05N=-.85}}}divide
{{{N=17}}}
N+D=28
{{{17+D=28}}}
{{{D=11}}}
check
.05N+.10D=1.95
{{{.05(17)+.10(11)=1.95}}}
{{{.85+1.10=1.95}}}
{{{1.95=1.95}}} correct